Have lately noticed that some series has had all releases removed, or so I thought. Currently looking at Isekai Teni Shita node Cheat o Ika Shite Mahou Kenshi Yaru Koto ni Suru which has nothing under Latest Releases. If I update the page they then show up. What is up with that?

~4400 manga completed
~1700 ongoing...

I've been seeing this as well. A quick refresh of the page usually solves the issue. The site (for me, anyway) has been running very slow at times, and I'll click on a link (for example, to go to a manga page, or go to the release section, etc.), and nothing will happen for 5 to 10 seconds and then it will suddenly switch over. I don't even get a "loading" icon on my browser, just nothing for a few seconds before clicking over. Not sure if these two issues are related, but it's definitely a change from where it was before.